Locking mechanism for power apportioning devices



Nov. 8, 1932, A. D. ROBBINS 1,886,837

LOCKING MEQHANISM FOR POWER'APPORTIONING DEVICES Filed Dec. 2. 1931 @7, Y ,@flu. d JzIAfATToRNVExs' Patented Nov. `8, 1932 Unir AZUR D. R-OIBBINS, F HIGHLAND PARK, NE MOTOR COMPANY, OT? NEW YORK, N.

Application ined December 2, 1931. serial naam/141:

power ap- The present invention relates to embodies, more portioning mechanisms and specifically, a de yice-lor pportioning power between a plurality of elements wherein a means is provided for locking the device to prevent the functioning of the'device as an apportioning means.

More particularly, the invention embodies a locking mechanism for power apportioning devices or difierential mechanisms of the type wherein a plurality of radially aisposed cam tracks are engaged bya plurality of driving wedges, the cam tracks having power apportioned therebetween by such wedges.

Locking mechanisms have heretofore been provided for power apportioning devices of the typev now commercially used wherein bevel driving pinions are mounted upon a driving ring for engaging driven bevel gears upon aligned driven shafts. 1n connection with differential mechanisms of the type recently developed no satisfactory locking mechanism has yet been provided and an object of the present invention is to provide a device for locking differential mechanisms of the type employing spaced radialcam tracks and driving wedges.

A further object of the invention is to provide means whereby the carrier in which driving wedges of a powerapportioning or diderential mechanism are mounted may be locked to one or more of the driven elements whereby the device ceases to function as an apportioning mechanism.

Further objects, not specifically enumerated above, will be apparent as the invention is described in greater detail in connection with the accompanying drawing, wherein:

Figure 1 is a view in section, taken through the axis of a power appo-rtioning mechanism constructed in accordance with the present invention.

Figure 2 is a view in section, taken on line 2 2 of Figure 1, and looking inthe direc.

p tion of the arrows.

Referring to the above drawing, a driving shaft is shown at and is mounted within a sleeve 11 vwhich is journaled within a hous- *50 ing 12 by bearings 13. The sleeve 11 consti- .rnnsnm' Assienon To NTERNATIQNAL Y., A conronafrron'or nnnawnnnf tutes one of the driven elements, `the other driven.V element of the mechanism being shaft section 14 which is journaled'at 15 within a I cover 16, secured at 17 to the housing 12. A carrier 18 is securedto the driving shaft and formed with a cylindrical extension 19 within which a'plurality of driving wedges are slidably mounted. Inner and outer annular retaining members 21 are provided to prevent the dislodgment of the wedges and maintain them in a predetermined position with respect tothedriven members described hereinafter. Upon the sleeve 11, a cylindrical driven member 22 is mounted, this member being provided with a suitably formed interi nal cam track 23 against which the outer eX- tremities of the driving wedges engage. The shaft section 14 is whichav cam track 25 is formed, the inner surface of the wedges 20 engaging the cam track 25. rlhe foregoing the form of differential or power apportioning mechanism recently vdesigned byapplicant and constitutes noV part of the present invention. Y

' The cylindrical member 19 is'formed with an extension 2G within which spaced grooves 27 are formed. Upon the hub 24a splined section 28 is formed, a sleeve or clutch member 29 being slidably mounted thereon and formed with keys 30 for engaging the grooves of the splined section 28. The movable clutch member 29 is formed with radialteeth 31 which engage grooves 27' and thus prevent relative movement between the shaft 10 and shaft 14. I n A circumferential groove 32 is formed in the clutch 29 and is engaged by fingers 33 which are mounted upon a yoke 34 by trunnion bearings 35. The yoke 34 is keyed to a clutch operating shaft 36 upon which a lever 37 is secured, movement of shaft 36 thus effecting'the operation of the clutch 29, i

It willthus be seen that, upon engagement of teeth 31 with 10 is locked to of the fact that is prevented in grooves 27, driving element driven element 14. y In View member 22 is thus prevented from movement formed with a hub 24 upon" .70 structure corresponds to movement of the wedges 20 a plane perpendicular to the Y Y axis of the shafts 10'and 14, the cylindrical 100 with respect to shaft 10 and the entire mechanism is thus effectively locked.

While the invention has been described with specific reference to the accompanying drawing, it is not to be limited, save as deined in the appended claim.. a

I claim as my invention:

In combination with concentric, radially spaced driven members, a drivingmember spaced radiallytherebetvveen, means to ap.- portion' power between the driven members5 a clutch slidable axially on one of Jthe driven members, and interengaging teetlv on the clutch and the drivingmember. A 1 Y 15 This specification signed this 28th day of Nov. AQD; 1931.

. AZOR D. k-ROBBINS. 

